Transition metal catalyst and preparation method thereof, olefin polymerization catalyst composition and application

By combining imine-amide type transition metal compound catalysts with organoaluminum compounds to form a double-chain catalyst composition, the high-temperature instability and insufficient selectivity of Ziegler-Natta and metallocene catalysts were solved, achieving efficient cyclic olefin copolymerization and preparing cyclic olefin polymers with narrow molecular weight distribution and excellent mechanical properties.

CN121717834APending Publication Date: 2026-03-24JIANGSU BREE OPTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-25
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing Ziegler-Natta catalysts exhibit low reactivity towards cyclic olefins, while metallocene catalysts suffer from insufficient high-temperature stability and high cost, making it difficult to prepare high-performance copolymers.

Method used

By employing imine-amide type transition metal compound catalysts, and through the combination of specific compounds and organoaluminum compounds, a catalyst composition with a double-chain structure is formed, thereby improving high-temperature stability and selectivity.

Benefits of technology

The homogeneous copolymerization of ethylene and norbornene was achieved at high temperatures, producing a cyclic olefin polymer with a narrow molecular weight distribution and excellent mechanical properties, thus solving the problems of high-temperature instability and insufficient selectivity of traditional catalysts.

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Abstract

The invention provides a transition metal catalyst and a preparation method thereof, an olefin polymerization catalyst composition and application, and belongs to the technical field of polyolefin catalysts. The transition metal catalyst is an imine-amide type transition metal compound, the structural formula of the transition metal compound is shown in the specification, and R1-R9 are respectively and independently hydrogen, alkyl groups or aryl groups; and M is an IVB-IIB group transition metal atom. The transition metal compound provided by the invention can form a double-chain structure with activity, the catalyst composition is used for copolymerization of ethylene and norbornene, the problems of poor thermal stability, insufficient selectivity, wide molecular weight distribution of polymers and the like can be solved, and cycloolefin polymers with narrow molecular weight distribution and excellent mechanical properties are prepared.
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